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... and finally feel relieved it's not just me! I am 17 years old and this has been bothering me since last year. Since the summer I have put 1 stone on. I know we've had Christmas and I've had a holiday slipped in there too but I just don't understand. I bloat after anything I eat/drink and ...

... a mutation that causes them to fail to turn off the production of lactase enzyme after infancy. This was a harmful mutation if it happened to a stone age person, because their body would waste energy (even a tiny bit counts in the long run!) by producing an enzyme that had no use for an adult. ...

... occurred, we would idealize it because this is the way we can interact with the external environment. Once again, for a non living being such as a stone, human eye is nothing but chemicals and chemical reactions. So the random chemical reactions point of view suggests that living creatures had ...